Duplicator



Aug. 20, 1935. c. H. BRADT 2,011,708

DUPLICATOR Filed Feb. 24, 1954 2 Sheets-Sheet l INVENTOR CHARLES H. BRAOT ATTORNEYS Aug. 20, 1935. c. H. BRADT 2,011,708

DUPLICATOR I Filed Feb. 24, 1934 2 Sheets-Sheet 2 Y Fag- 42 27 2a INVENTOR CHARLES H. BRADT ATTORNEYS Patented Aug. 2%, 1935 ZMLNS rarest orrics I nnrnroa'ron Charles H.. Bradt, Grotcn, N. Y., assignor to L. C. Smith & Corona Typewriters, Inc., Syracuse, N. Y., a corporation of New York Application February 24, 1934, Serial 'No. 712,770

10 Claims.

This invention relates to improvements in duplicators of the hectograph type.

; The invention has for its principal objects the provision of an emcient portable and encased hectograph duplicator, and the provision of a simple, compact and inexpensive portable duplicator having hectograph slabs interchangeably usable as the duplicating mediumor element of the duplicator, 'said duplicator having efficient provisions for supporting said slabs' and for storageof a supply of paper sheetsv and of various articles for use in connection with the duplicator, such as a sponge, sponge'tray, sheet-laying hand roller, bottles of ink, and the like.

Other objects and advantages of the invention will appear from the following description of the preferred embodiment of the invention illustrated in the accompanying drawings.

. In the 'drawings: 7 V

Fig. 1 is a front end view' of the duplicator, the cover element of the casing being shown partly opened and parts of the casing being broken away; I

Fig. 2 is a fragmentary top plan. view of the duplicator with the cover fully open;

Fig. 3 is a vertical longitudinal sectional View on the .line 3-3 of Fig. 2;

Fig. 4 isa view similar .to Fig. 3, showing how a hectograph slab is placed upon and removed from the bed of the duplicator, the extra interchangeable slabs being entirely removedto more clearly show the means whereby they are stored beneath the bed; I V I Fig. 5 is a fragmentary front view of the duplicato f, the cover being fully opened as in Fig. 2' and the hinged slab and paper sheet carrying unit being shown swung up and supported in a substantially vertical position;

Fig. 6 is a perspective view of one of the interchangeable hectograph slabs; and V Fig. 7 is a detail sectional View on the line 'l-'I of Fig. 2 showing a latch element attached to the hinged unit which carries the slabsand paper sheets.

The enclosing casing of the duplicator comprises a'box and a hinged cover for'the box. The box has a front end wall It, a rear end wall I I, side walls l2 and I3, and a bottom wall It. The cover has a top wall I5, a frontend wall It, a rear end wall I7, and side walls I8 and I9. Three parallel vertical partitions orfdivision walls 20 extend transversely of the box from side wall'IZ to side wall I3 and divide the box into four p storage compartments. Wallsor partitions 20 55' extend up from the bottom wall of the box and have horizontal upper edges all lying in a single plane slightly below the level of the upper edges of the side and end walls of the box. A pair of hingesZI. connect the side wall I2 of the box and the side wall I 8 of the box cover for swing- 5 ing of the cover through an arc of 180 degrees from the closed position to the fully openposition of the cover, each of the walls I2 and I8 being provided with a longitudinally spaced pair of knobs or projections 22 for abutting the other of said walls to support the fully opened cover in inverted position in a horizontal plane to serve as a paper tray. Walls I3 and IQ .of the box and cover are provided with the coactive parts 1 23 and 2 3 of a well known form of latch for holding the cover in closed position, said latch being of a kind commonly provided on traveling bags. A suitable carrying handle 25 is attached to wall I3 of the box.

Mounted on the box for enclosure within the casing formed by the box and cover is a hinged box-like unit or smaller inner box having an open front end. This inner box or unit has a bottom wall 25, a top wall 21, longitudinal'side walls 28 and 29, and a rear end wall 30. Wall 39 has a reduced upper end portion 3| which projects slightly above the level of the top face of wall 27 for abutment. by the rear edge ofa hectograph slab. Each of the walls 28 and 29 is provided with a pair of horizontab channels or grooves 32 in its inner face extending from its front edge to, the rear wall and forming slideways for supporting two hectograph slabs in spacedsuperposed relation between and spaced from both the top wall 2'! and the bottom wall 26 of the inner box.

b The inner box is normally seatedon the top edges of the partitions 20, the bottom wall of the inner box resting on the partitions with its top faceflush with the top edgesof the side and end walls of the outer box. I The portion of the inner box which projects above the outer box is enclosed within the cover of the outer box when said cover is closed. The inner box is hinged to the outer box to swing upward and .45 sidewise from its normal position through an arc of slightly more than 90 degrees, walls I2 and 28 of said boxes being connected by a pair of hinges 33 whose axes are substantially at the level of the top edge of wall I2. opposite hinges 2I and engage the latter as shown in Fig. 5 to support the inner box in an edgewise tilted position which affords free access to the opened inverted cover and to the compartments in the outer box.

I to be used; in taking copies; said supply or stack Theinn er'box is latched in its normal position by the two engaged elements 34 and 35 of a suitable latch. This latch comprises va fixed pin wardlynincl-ined cam portion '3'5eradapted to ride over pin34as the inner box is swung down on partitions 2G; and has an aperture 36 above said .cam portion inwhich pin 34 engages as the outer box reaches its normal position; Arm 35 maybe provided with a second aperture 31indicating a suitable point' oi applicationoft'fim 'ger pressure torelease'the latch:

Three identical interchangeable hectograph' slabs are provided, two .beingsupportedin stor-- a age in the inner box, and the third being de' tachably, held upon'the top wall of the. innertbox for use in making copies. Each slab comprises -a rigidflat base 38 "oblong in plan and formed of pressboard :or' other i suitable frigid material,

and a layeryof gelatin or other suitable hecto- '-graphic material w affixed" to' the" upperface of the-basebut of smaller area than said face so astoz-leave an exposed marginal portion of the base entirely-around the ,gelatinlayer; Theser slabs are slightly'shorter than-thei inner box and slightly greater in width than the internal width of the" box, two of the; slabs being, enclosed within-the-innerboxintowhich they are slid with the, longitudinal marginal portions of the slabs engaged'in the -gm vessz-to support the slabs out of contact with each'other; The. lowermostslab in the boxforms aitop wall for a con1 partmentfor a'supply'or'stack of paper sheets -of sheets resting onthe bottom -wall"26 of the end edge. .bined slab-retainer and sheet-gauging margin bar preferably formed of-sheet metal.

inner box. It will be observed that the'opening at 'thefront 'erid-- of the'inner bg is entirely exposed! for accessto thei'stored slabs-and paper sheets-when the cover for--the outer boxds fully opened. The top-wallfl of-the inner box forms the bed for the third hectograph slab, towhich bed said slab-is Idet'achably held; against movement in any dire ctionrelatively-to the bed. The

rearendedg'e-of thebaseof thisslab abuts the upwardly projecting end portion "SI of end wall 30 of; F the inner box, the I exposed longitudinal 1 side'marginal-portions; of the slab are slidably 2 confined in -slide'ways formed by-"inverted L; shaped ilanges 40 formed along the; inner: edges of a pair ofsheet metal bars il fastened'to bed longitudinal marginal? portionsof the bed sub stantially the'full length of the bed. FThe' horizon. tal l-egsofffiangesfid' extend inward toward each other and 'engag'ethe upper facesof the side marginal portions of the slab face, said legs preferably being bentupward slightly at their,

forward ends as shown. v

The bed 27 has va wide'not'chi4 2" in its front At thefronten-d'of the bed is' a come 7 I l v This retainerv and margin bar'jcomprises a flatbar. 43

extending transversely of-th'e bed'and hinged'at its rear edge to the bed beneath the" bed and in.

rear of notclr' ii by a pair of: hinges to swing up and "downjabout a horizontal axis extending transversely'ofthebedi Bar 43 has an upstand-' ing flange 45' alongits frontiedge which normally slab on the bed, said flange normally abutting the front end edge of the base portion. ofsaid slab. Hinge springs G6 normally yieldingly hold the'bar 43 engaged flatwise with the lower face of the bed.

Inapplying a master. sheet to the slab, held on the, bed to tran'sfer a negative to the gelatin surface of said slab, and in applying afclean sheet 'to said slab to transfer to" the sheet a copy from ".of: with the rear face of the flange d5 of the .margin bar where said flange projects above the slab; Ereferably the well known hand roller is provided forsmoothly laying the gauged sheet 'upo'n theslab'. When the duplicator is not in use the hand roller may be stored in one of the v compartmentsin the outer boxelement of the Vided with a pair of transverselyspaced fingerclearance notches. 48 extending rearward" through fiange tdand part way through bar 43, both said notches-8 being in vertical register 'vfith the wide bed notch 52 and also with a pair of transversely spaced" finger clearance notches 69 in the iront'exposed marginal portion of the base of said slab. ,The rear marginal'portion of the'slab has "an identical pairflof notches 49 identically arranged th'erein. fThe?interchangeable.identical slabs may thusbe reversed end for endpn the bed. Be'd' notch 42 permits grasping of the front marginal portion of the slab on the bed centrally Aj stack. of clean copy sheets stored in the inner boxmay, if desired be slid part way outzof the open end of thetinnerboxfor removal one at a'time for application tofthe slab on the bed.

Completed copies stripped from the bed may be stacked'in the tray' formed by the opened'cover of the outer'box element during the. making of a runof copies. The'slabs may be readily interchanged for use in making successive runs of copies. The compartments in the outer box affford storage space for the handroller, bottles ofinkysponge, sponge tray and. other articles v I p t j commonlyused with hectograph'duplioators. zl-atithe-top-iaceoff the-bedand'extendingialong T facilitate partial o-rentire removal of stored paper from the inner box,'especial1y short'sheets. the"bottom.wa'llof, the box is provided. with two fore-and-aft spaced] finger openings .55 accessible by ,unlatching and swinging up the inner boxy What I claim is: a

1.' A hectograph duplicator comprising a carrying case, a box in said case; and hinged at one sidethereof to the case and having an open end, saidbox having means therein for detachably supporting t riebrfmorev hectograph duplicating slabsfor "the withdrawal. and insertion of such slabs through said open end of said" box while i the caseis'opened and alsohaving means for detachably holding a hectograph duplicating slab to alwall face of. said box which is exposed when thecarrying case is opened,- for. use of said lastmentioned slab in making hectograph copies.

. 2. Alhectograph duplicator comprising a box having cover, a bedadapted tobeenclosed by said box and cover and hinged to the box, means gaging the otherend of the slab.

3. A hectograph duplicator comprising a frame including a bed and storage means therebelow for removably supporting a plurality of hectograph slabs and a supply of paper sheets, means on said frame for detachably holding a hectograph siab on said bed, and an enclosing and carrying case 7 for said frame and means, said case comprising a base section upon which said frame is mounted and a cover section shiftable to uncover said bed and afford access to slabs and sheets supported below the bed by said storage means.

4. A hectograph duplicator comprising a bed, a hectograph slab on said bed, means on said bed forming slideways extending longitudinally of the bed and 'in which side marginal portions of said slab are engaged, means atone end of the bed abutted by the adjacent end of the slab, a combined slab-retainer and sheet-gauging margin bar at the opposite end of the bed engaging the opposite end of the slab and shiftably supported to permit sliding withdrawal of the slab from the bed, and a carrying case adapted when closed to enclose said bed and means and bar and the slab and upon which case said bed is mounted for supporting the slab for use in making copies when the case is opened.

5. A hectographduplicator comprising a bed, means extending longitudinally of said bed forming a pair of parallel slideways at opposite sides of the bed for a hectograph slab on the bed, a hectograph slab on said bed engaged in said slideways, means at one end of the bed fixed relatively to the bed and engaging one end edge of the slab, theopposite end of the bed having a notch therein extending under the adjacent end of the slab, a combined slab-retainer and sheet-gauging margin bar pivotally held to the bed beneath the notched end of the bed to swing about an axis extending transversely of the bed and having an upstanding flange normally abutting the adjacent end of the slab and extending above the level of the slab for engagement therewith of one edge of a sheet to be applied to the slab, spring means for yieldingly holding the combined slab-retainer and margin bar rocked into normal position, said bar having a finger clearance notch extending rearward therein and in vertical register with the bed notch, said slab having a finger clearance notch in one end thereof in vertical register with said bar and bed notches, and a carrying case enclosing said bed, means, slab and margin bar and having a section upon which said bed is mounted and which is adapted to support the bed when the case is opened.

6. A hectograph duplicator comprising a box having, an open upper end, a second box having an open side and hinged adjacent its bottom to the first box adjacent the top or" the first box to swing from and to a horizontal position overlying and spaced from the bottom of the first box, said first box having fixed abutment means therein for supporting the second box in said horizontal position with the open side ,of the second box unobstructed by the first box, said first box. having storage space therein below the second box and accessible upon swinging of the second box from said horizontal position, means for removably holding a hectograph slab onthe top of the second box for use in making copies, means in the second box for removably supporting therein hectograph slabs for withdrawal and insertion through the open side of the second box, and a box-like cover for the first box hinged to the latter box to swing from a closed position in which said first box and its cover completely enclose the second box to an inverted horizontal position at one side for supporting the second box in said horizontal position, said first box having storage space therein below the second box and accessible upon swinging of the second box from said horizontal position, means for detachably holding a hectograph slab to the top wall of the second box for use in making copies, means forming slideways in the second box for removably supporting one or more hectograph slabs in the second box for sliding withdrawal through the open side of the second box, means for latching the second box to the first box with the bottom wall of the second box seated on said fixed supporting means in the first box, and a box-like cover for the first box, said first box and its cover being adapted to completely enclose the second box.

8. A hectograph duplicator comprising an outer box; a box-like cover for the outer box hinged to the outer box; vertical partitions in the outer box dividing the outer box into storage compartments; an inner storage box having a top wall, a bottom wall, longitudinal side walls, an end wall and one open end; said inner box being hinged at one longitudinal side thereof to one longitudinal side wall of the outer box for seating of the bottom wall of the inner box on the tops of the partitions in the outer box; said partitions supporting the inner box with its open end completely accessible when the hinged cover of the outer box is opened; said inner box being swingable about its hinge axis, while said cover is open, to afiord access to the storage compartments in the outer box; and a hectograph slab held to the top face of the top wall of the inner box; said outer box and its cover being adapted to enclose said inner box and said slab thereon when the cover is closed.

9. A hectograph duplicator comprising an outer box; a box-like cover for the outer box hinged to the outer box; vertical partitions inithe outer box dividing the outer box into storage compartments; an inner storage box having a top wall, a bottom wall, longitudinal side walls, an end wall and one open end; said inner box being hinged at one longitudinal side thereof to one longitudinal side wall of the outer box for seating of the bottom wall of the inner box on the tops of the partitions in the outer box; said partitions supporting the inner box with its open end completely accessible when the hinged cover of the outer box is opened; said inner box being swingable about its hinge axis, while said cover is open, to afford access to the storage compartments in the outer box;. .and. means for-detaohablyrhoi ding ahectoe graph slahzto the top face of the topwallof the inneribox; said outer box, and. itSlZOVeI being adapted to enclosetheinnerbox andsaidslab-hoidingmeans when the cover isiclosed; and saidinner box being provided witlrmeansfor;slidablyfsupporting in said innerboxin superposed. andspa'ced.

relation a pluralityof heotograph' slabs for individuai' insertion and. .withdrawl of the slabs throughthe open 'endrof the inner box while the coveriof .the: outer box is swung open.

v 10.;A heetograph duplicator comprisingan out,-

ler boxyfla box-like cover for .theoutenbox hinged to the outer box;; ve rtical partitionsin" the outer box dividing; the outer-box into storage compartinents; an inner, storageboxhaving a top Wa11,,a bottom walhlongitudinalsicie Walls, an end-Wall and. one open end; 'said inner box '=being hinged.

' atone. longitudinal side thereof tooneiongitudinai side wall ofithe; outer box for. seating of the ;bot-

tom'wail of the inner box onthetops-oi the partitions in the outeribox; said. partitions supporting the, innerbox with itsopen end. completely accessible when itheghing ed cover of the, routerhbox is opened; said innerbox being swingable' about and saidslab thereon when the cover is closed;

andvmeansi for latching. the inner box to the outer box against'hingernovementiand with the inner hox-seatedpupon the, tops of the: partitions in the outerabox'.

,CVIV-IARLES DTQ 

